NSSDCA ID: 1958-001A-03
Mission Name: Explorer 1Because of its symmetrical shape, Explorer 1 was selected for use in determining upper atmospheric densities as a function of altitude, latitude, season, and solar activity. Density values near perigee were deduced from sequential observations of the spacecraft position, using optical (Baker-Nunn camera network) and radio and/or radar tracking techniques. A good discussion of the general techniques used to deduce density values from satellite drag data can be found in L. G. Jacchia and J. Slowey, "Accurate drag determination for eight artificial satellites of atmospheric densities and temperatures," Smithsonian Astrophysical Observatory special report n. 100, Cambridge, Mass., July 1962. This experiment resulted in the successful determination of reasonable density values until the spacecraft reentered the earth's atmosphere on March 31, 1970.
Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Jack W. Slowey | Other Investigator | Smithsonian Astrophysical Observatory | |
Dr. Luigi G. Jacchia | Principal Investigator | Smithsonian Astrophysical Observatory |